Sodium PCA is the salt form of pyroglutamic acid (Pyrrolidone Carbolic Acid), which is the epidermis’ own moisture factor. A substance that binds moisture to the skin. In dry, sensitive or mature skin, there is less of this substance. If you have these problems, it is beneficial to use products with PCA to strengthen the skin. This counteracts irritation, itching and inflammation.
The hair becomes less static and more easily combed. PCA preserves the color if you have treated hair and helps to take extra care in dry and damaged hair.